It's amazing to me how much is known about the trilobites. Even just reading the Wikipedia summary is a lengthy endeavor. The one above is an example of the truly remarkable ones that have been recovered in Morocco (awesome specimens at this gallery). And assuming this one is real (there are lots of fake fossils), imagine the hours that were spent with dental tools to free it from the matrix.
More information at the New York Times.
Embedded image cropped (without change of content) from the original, credited to Chip Clark/Smithsonian.